Nearly 9,000 Australian adults, divided into 3 groups, were tracked for roughly six and a half years by researchers: those who watched TV less than 2 hours per day, between 2 and 4 hours, and more than 4 hours.
Researchers found that those who watched TV more than 4 hrs had a 46% higher risk of death from all causes and an 80% higher risk of cardiovascular death, each hour watching the TV per day increased the risk of death from cardiovascular disease by 18% and the risk of cancer death by 9%. The study was published online in Circualtion.
Researchers found a strong connection between TV hours and death from cardiovascular disease not only in overweight and obese people, but also among those who had a healthy weight. The lead author said "sitting for long periods has unhealthy influence on blood sugar and blood fats".
Source: Television Viewing Time and Mortality. The Australian Diabetes, Obesity and Lifestyle Study (AusDiab). Circulation. Published online before print January 11, 2010
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